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Fluid inlet screen being moveable to bypass position

a technology of inlet screen and bypass position, which is applied in the field of fluid filters, can solve the problems of high pressure drop

Inactive Publication Date: 2016-03-03
HAMILTON SUNDSTRAND CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent describes a fluid filter assembly that includes a housing, a filter element, and a filter portion. The filter element is biased against the housing by a spring and can move to a bypass position if the pressure drop is too great. The assembly also includes a hydraulic system. The technical effect of this invention is an improved fluid filter that can better handle high pressure drops and prevent damage to the filter element.

Problems solved by technology

Under certain conditions, the filter can result in a very high pressure drop that can be detrimental to a pump.

Method used

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  • Fluid inlet screen being moveable to bypass position
  • Fluid inlet screen being moveable to bypass position

Examples

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Embodiment Construction

[0010]A hydraulic system 20 is illustrated in FIG. 1. A filter assembly 22 includes an outer housing 24. A filter element 26 is received within housing 24 and has a frusto-conical forward filter portion 28 and a rear face 30. Retainer rings 32 and 34 retain the filter element 26 and a spring 36 within the housing 24. A spring retainer 38 further serves to properly position the spring 36. As shown, the spring 36 acts against the face 30 and biases the filter element 22 against the ring 32.

[0011]In the position shown in FIG. 1, the filter element 26 is in the path of fluid flowing from a tube 40 to a tube 44. The tube 40 receives hydraulic fluid from a source 42 and the tube 44 communicates with a pump 46.

[0012]As shown, particles 47 may be in this fluid flow, and in the FIG. 1 position the fluid all flows through the filter element 26. Thus, the particles 47 will be prevented from reaching the pump 46.

[0013]While a pump 46 is disclosed, any number of other components may also benefit...

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Abstract

A fluid filter assembly comprises an outer housing, a filter element including a face, and a filter portion extending from the face. The housing has an inlet and an outlet. A spring biases the face against a housing structure at the inlet. A pressure drop across the filter assembly biases the filter element against the spring force such that if the pressure drop exceeds the spring force, the filter element can move to a bypass position. A hydraulic system is also disclosed.

Description

STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT[0001]This invention was made with government support under Contract No. N00019-08-G-0002XT23, awarded by the United States Navy. The Government has certain rights in this invention.BACKGROUND OF THE INVENTION[0002]This application relates to a fluid filter that is moveable to a bypass position under certain conditions.[0003]Hydraulic systems are known and, typically, include a hydraulic supply supplying a fluid to a pump. The pump moves the hydraulic fluid for various uses. It is known to provide a filter associated with an inlet to the pump to remove metal debris, etc. from the hydraulic fluid before it reaches the pump.[0004]Known filters for use in hydraulic systems have typically included a fixed filter element. Under certain conditions, the filter can result in a very high pressure drop that can be detrimental to a pump.SUMMARY OF THE INVENTION[0005]A fluid filter assembly comprises an outer housing, a filter eleme...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B01D35/147B01D29/00B01D35/02
CPCB01D35/1475B01D29/0097B01D35/02B01D35/147B01D27/103B01D29/70B01D2201/02
Inventor PLICKYS, MARK, R.
Owner HAMILTON SUNDSTRAND CORP